Senior Platform Engineer

GTC Recruitment Ltd; Milton Keynes; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

GTC Recruitment Ltd seeks a Senior Platform Engineer to design and operate secure, enterprise-scale infrastructure across Azure and on-premises environments.

The role emphasizes Azure Arc, AMA, Windows and Linux administration, networking, XDR/EDR, and automation. You will collaborate with Infrastructure, Cyber Security and Operations teams to ensure resilience, security and high availability in a DV-cleared, hybrid setting in Milton Keynes (with some London work).

Qualifications

• 5+ years' experience in Platform, Infrastructure, Cloud Engineering or Systems Administration.
• Current DV clearance and DV clearance – essential.
• Experience with Azure Arc-enabled servers, AMA, DCRs and hybrid infrastructure is required.

Responsibilities

• Maintain secure, enterprise-scale Azure and on-premises platforms.
• Deploy and manage Azure Arc-enabled servers, subscriptions and resource groups.
• Monitor across Windows and Linux with AMA, Log Analytics and DCRs.
• Deploy and support XDR/EDR agents and ensure health and onboarding.
• Automate deployment and operations with PowerShell, Bash and IaC (Terraform/Bicep/ARM).

Skills

Azure

Hybrid Infrastructure

Azure Arc

Azure Monitor

Windows & Linux Administration

XDR/EDR

Networking

Automation

PowerShell

Bash

Terraform

Bicep

ARM templates

Tools

Ansible

Entra ID

Defender for Cloud

Job description

Location: Hybrid – 60% onsite, primarily Milton Keynes (some London)

IR35: Inside IR35

Security Clearance: Current DV Clearance – Essential

Role Overview

We are seeking an experienced Senior Platform Engineer to support secure, enterprise‑scale infrastructure across Microsoft Azure and on‑premises environments.

The role focuses on Azure infrastructure, Azure Arc, Azure Monitor/AMA, Windows and Linux administration, networking, endpoint security/XDR and automation. You will work closely with Infrastructure, Cyber Security and Operations teams to maintain resilient, secure and highly available platforms.

Key Skills & Experience

• Azure & Hybrid Infrastructure: Strong Azure administration with hands‑on experience deploying and managing Azure Arc‑enabled servers, subscriptions, resource groups, RBAC and hybrid infrastructure.
• Monitoring & Observability: Experience with Azure Monitor Agent (AMA), Log Analytics, Data Collection Rules (DCRs), dashboards, alerting and infrastructure monitoring across Windows and Linux.
• Endpoint Security/XDR: Hands‑on deployment and support of XDR/EDR agents across enterprise Windows and Linux estates, including troubleshooting onboarding, connectivity and agent health.
• Windows & Linux: Strong enterprise server administration covering Windows Server, Active Directory, DNS, DHCP, Group Policy, certificates, alongside Linux services, packages, SSH, storage, patching and hardening.
• Networking: Strong TCP/IP and enterprise networking knowledge including DNS, routing, firewalls, proxies, VPNs and load balancers, plus Azure VNets, NSGs, Azure Firewall, VPN Gateway, ExpressRoute and Private Endpoints.
• Automation & IaC: Experience with PowerShell, Bash and Infrastructure as Code, ideally using Terraform, Bicep or ARM templates, with a focus on automating deployment, validation and operational tasks.

Additional Experience

Experience with Microsoft Defender XDR, CrowdStrike, SentinelOne, Cortex XDR, Intune, SCCM, Ansible, Terraform, Bicep, Entra ID, Defender for Cloud, CI/CD, DevOps or ITIL would be advantageous.

• Current DV Security Clearance
• 5+ years' experience in Platform, Infrastructure, Cloud Engineering or Systems Administration
• Strong hands‑on Azure and hybrid infrastructure experience
• Enterprise Windows and Linux administration
• XDR/EDR deployment and support experience
• Strong networking and troubleshooting skills
• PowerShell and Bash scripting experience
• Excellent communication and stakeholder management skills
• Strong focus on security, reliability and operational excellence

Please note: This is a hands‑on engineering role within a complex, secure enterprise environment, with DV clearance essential.